Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

A cleaning solution has a pH of 12. How is it described?

1. AWeakly acidic
2. BNeutral
3. CStrongly acidic
4. DStrongly basic

According to the Arrhenius definition, what does an acid produce in water?

1. AHydroxide ions (OH⁻)
2. BSodium ions (Na⁺)
3. CHydrogen ions (H⁺)
4. DOxide ions (O²⁻)

What is an alpha particle made of?

1. AA single high-energy electron
2. B2 protons and 2 neutrons
3. C1 proton and 1 electron
4. DPure electromagnetic energy

Oksijen gazı (O₂) molekülünde ne tür bir bağ bulunur?

1. AApolar kovalent çift bağ
2. BMetalik bağ
3. CPolar kovalent tek bağ
4. Dİyonik bağ

Sıcaklığı artırmak, tepkime hızını genellikle nasıl etkiler?

1. ATepkimeyi tamamen durdurur
2. BHızı artırır
3. CHıza etkisi yoktur
4. DHızı azaltır

Why does keeping food in a refrigerator slow down spoilage?

1. ALower temperatures raise the activation energy of every reaction
2. BCold air contains no oxygen
3. CLower temperatures slow down chemical and microbial reactions
4. DCold temperatures add preservatives to the food

In the Bohr model, what happens when an electron drops from a higher energy level to a lower one?

1. AEnergy is absorbed from the surroundings
2. BEnergy is released, often as light
3. CThe atom gains a proton
4. DThe electron leaves the atom

Carbon-12 and carbon-14 react in exactly the same way in chemical reactions. Why?

1. AThey have the same number of neutrons
2. BThey have the same number of protons and electrons
3. CThey have the same mass number
4. DCarbon-14 turns into carbon-12 before reacting